Automatic self-packing plunger-pump.



' which sand is mingled pnirnn .srnrns rarnivr euries.

EDWARD J". SCHNEIDER, OF HOLLYWOO'ISJ, AND WILLIAM RUFUS RITCHIE AND WILLIAM KAMMERER, OF

COLEG-ROVE, CALIFORNIA.

1 AUTOMATIC SELF-PACKING- PLUNGER-PUMP.

Application led .Tuly 7,

Specication of Letters Patent. 1909, Serial No. 506,412. Renewed J'u1y'24, 1911.

Patented Mar. 5, 1912.

Serial No. 640,331.

To all tv/tom t may concern Be it known that we, EDWARD J. SCHNEIDER, residing at Hollywood, in the county of Los Angeles and State of California, and WILLIAM RUrUs RrroHIn and WIL- LIAM KAMMERER, both residing at Colegrove, in said county and State, all being citizens of the United States, have invented a new and useful Automatic Self-Packing Plunger-Pump, of which the following is a speciication.

This invention is more particularly valuable for use in deep well-pumps, but it is ap-y plicable to any form of plunger-pump.

The purpose of the invention is to provide a pump in which the flow of liquid between the plunger and the working-barrel of the pump will be prevented in the most effective manner and at minimum expense.

I In deep well-pumps, such as oil-wells, in with the fluid to be pumped, much loss of time, labor, production and pump-mechanism results from the wearing away of parts of the pump by sand which the fluid carries into the space bet-ween the plunger and the working-barrel.

An object of this invention is to avoid such loss by novel and improved means.

The invention is capable of being carried out in many different forms, and we do not limit the construction to any particular form. y

The accompanying drawings illustrate the invention in the form at present deemed best.

Figure l is a fragmental elevation, partly in axial section on line w1, Figs. 2, 3 and 4, of a plungerpump constructed in accord ance with this invention. Fig. 2 is an enlarged fragmental detail of the same sectioned on line m2, Figs. l, 3 and 4. Fig. 3 is a cross-section on line m3, Figs. l, and 5. Fig. 4 is a cross-section on line m4, Figs. 1,` 2 and 5. In Figs. 3 and 4 the working-barrel is broken to contract the view. Fig. 5

is a fragmentary elevation of a pump embodying this invention and installed in a well which is shown in sectional elevation.

.Parts of the pump are sectioned to expose interior construction.

The working-barrel l, connectingrod 2,

Vand cage 3 may all be of the usual construction,

except that the cage has no valve-seat. The valve-seat 4 is spaced below the cage 3 to seat the valve 5, a stop 6 being provided at a distance above the valve 5 when the same is a metal ball as shown, in order to cause the valve to return promptly to its seat on the up-stroke of the plunger. The form of this stop may be the same as that of the usual cage excepting that it is preferable that the same should be perforated in the crown as shown at 7, to allow the-liquid to pass therethrough centrally todislodge the ball in case of sticking, and to facilitate its return to the valve-seat. This feature, however, is no part of this invention.

Outside the hollow, rigid portion 8 of the plunger is provided a distensible packingjacket 9 adapted to iit the inside of the working-barrel 1 and hermetically sealed below its distensible portion by suitable means, as the sleeve 10, to the rigid portion 8 of the plunger. The interior of said distensible paoking-jacket 9 is subject to the pressure of the liquid in the working-barrel 1. Said packing-jacket may be of any suitable material that is durable and practically impervious to the liquid to be pumped.

In the form shown, the liquid is admitted to the interior of the distensible jacket 9 from the interior of the plunger above the valve-seat 4, through perforations 11; the upper end of the jacket 9 being slidable on the rigid portion 8, and in this instance incased and protected by a sleeve 12 which may be loose and slidable with the upper end of the jacket along the rigid portion 8, thus allowing freedom of the acket 9 to eXl pand responsive to the pressure of the Vliquid so as to tit the inside of the working-barrel tightly on the rlp-stroke of the piston. Such action may be increased by contact of the upper loose sleeve 12 with the inside of the working-barrel. On the down-stroke, when the liquid is supported by the standingvalve 13 the distensible jacket 9 will be relieved from the pressure of the column of liquid and will move down practically friotionless.

The jacket 9 may be secured at its lower end by any suitable means, as by rivets or cement. In Fig. 2 cement is shown at 14 for this purpose. It is thus seen that the distensible jacket is subject interiorly to the pressure of the liquid carried by the plunger on the up-stroke, and that on the' down stroke such pressure is borne by the standing-valve, thus allowing comparatively free movement at that time.

In practice, the packing-jacket may be metallic or fibrous, or may be a combination of metallic and fibrous material, and may be of any practicable thickness; and at the outset the jacket may fit the working-barrel tightly and the distension of the jacket may at first be so slight as to be imperceptible, but as the jacket wears away on the outside the distension will gradually increase to automatically take up the space until the jacket is worn out.

In some instances the jacket may be a piece of rubber or other hose and it may be fastened inside the upper sleeve 12 by any suitable means, as for example, by the cement 14 shown.

The upper and lower ends of the rigid portion 8 and of the plunger are screw threaded and the perforations 11 are between the screw threaded portions. The lower sleeve 10 has a screw threaded portion at its lower end of less length than the screw threaded portion at the lower end of the rigid portion 8 and is screwed there-onto so 'that the rigid port-ion 8 projects below the lower sleeve 10 to receive the valve cage 15, which is screwed tightly against the lower sleeve 10. The upper end of the rigid portion 8 is also screw threaded and an annular stop 16 is screwed there-onto to contact with the upper end of the sliding sleeve 12, and on top of this the coupling 17 is screwed onto the end of the rigid portion 8 and onto said coupling the top cage 3 is screwed. The valve cage 15, the lower fixed sleeve 10 and the lower portion of the sliding sleeve 12 are made to fit the interior of the working barrel 1 of the pump, and the jacket 9 is normally of the same diameter as the parts 15 and 10 and the lower portion of the sliding sleeve 12. Consequently the wear upon all the arts is evenly distributed and the amount of the distension required of the jacket is minimized.

We claim 1. A plunger-pump comprising a working-barrel, a plunger inside the barrel, and a distensible jacket between the plunger and the barrel, said jacket being hermetically sealed at its lower end to the plunger and being free at its upper end to slide on the plunger and also being open interiorly to the pressure of the liquid carried by the plunger.

2. A pump-plunger provided exteriorly with a distensible jacket practically impermeable to the liquid to be pumped, a portion of said jacket being hermetically sealed to the plunger, and a portion of said jacket above said sealed portion being subject interiorly to the pressure of the liquid carried by the plunger and the upper end of the jacket being slidable on the plunger.

3. A pump-plunger provided with a rigid portion, a distensible jacket hermetically sealed to said rigid portion and extending therealong above the seal, and having its upper end slidable on the plunger and means for admitting to the interior hydraulic pressure tromv the liquid carried by the plunger.

4L. A pump-piston comprising a hollow, rigid portion, a distensible jacket surrounding the saine, a sleeve sealing the lower end of said jacket to said rigid portion, said rigid portion being permeable to the liquid carried by the plunger, and said jacket being practically impermeable to such liquid and its upper end slidable on the plunger.

A pump-piston comprising a hollow, rigidportion, a distensible jacket surrounding the same, a sleeve sealing the lower end of said jacket to said rigid portion, said rigid port-ion being permeable to the liquid carried by the plunger, and said jacket being practically impermeable to such liquid, the upper end of the jacket being slidable on the plunger and a sleeve on said right portion to protect the upper end of the jacket.

6. A pump-piston comprising a hollow, rigid portion, a distensible jacket surrounding the same, a sleeve sealing the lower end of said jacket to said rigid portion, said rigid portion being permeable to the liquid carried by the plunger, and said jacket being practically impermeable to such liquid, and a sleeve movable along said rigid portion to protect the upper end of the jacket, said upper end of the jacket being also movable along said rigid portion.

7. In a pump, a plunger comprising a rigid portion, a valve-seat at the lower end of said portion, a cage at the upper end of said portion, a stop above the valve-seat and below the cage, said rigid portion being perforated above the valve-seat, and a distensible jacket sealed to the rigid portion below the perforations and extending around said perforated portion, said upper end of the jacket being also movable along said rigid portion.

8. In a pump, a plunger comprising a rigid portion, a valve-seat at the lower end of said portion, a cage at the upper end of said portion, a stop above 4the valve-seat and below the cage said rigid portion being perforated above the valve-seat, a distensible jacket sealed to the rigid portion below the perforations and perforated portion, the upper end of the jacket being slidable on said rigid portion and a sleeve around said rigid portion to protect the upper end of said jacket.

9. In a plunger pump the combination with a working barrel, of a plunger comprising a rigid portion screw threaded at its ends and perforated intermediately, a sleeve and a valve cage screwed onto the lower screw threaded portion, a jacket fastened to extending around said the sleeve and surrounding the rigid portion above the sleeve, a sliding sleeve on the upper end of the jacket and slidable on the rigidi portion and means screwed onto the upper end of the rigid portion to make connection with the connecting rod of the pump; said cage, lower sleeve and jacket fitting the interior of the Working barrel.

In testimony whereof, We have hereunto EDWARD J. SCHNEIDER. WILLIAM RUFUS RITCI-IIE. WILLIAM KAMMERER.

In presence ont' JAMES R. ToWNsEND, L. BELLE RICE.

M Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

